Orange or brown dye and process of making same.



TED STATES PATENT oFF oE' ALFRED GRESSLY, F FRANKFORT-ON-THE-MAIN,GERMANY, ASSIGNOR To .OASSELLA coLoR COMPANY, or NEW .YORK, N. Y. 1

ORANGE on BROWN DYE ama 'rnocnss or MAKING sum.

To all whom it may concern:

Be it known that I, ALFRED citizen of Switzerland, and

Frankfort-on-the-Main,

Gnnssmr, a residing at Em ire, (whose v post-oilice address is No. 1

, Esc ersheimer Landstrasse, Frankfort-onthe-Maine, Ger1nany,) haveinventedsome SCll tion,

' illustrated I lavediscovered thatby allowingdinitrostilbenedisulfo'acid to act in alkai t1on on the sulfo. acids ofamidoazo compounds valuable dyestufi's are obtained,

which are distinguished by their remarkable affinity to cotton fiber aswell as by their excellent fastness. orange and'orange-red tobrownaccording tothe materials employed, but the durationand'temperature of the 0 eration also influence the de th of the sha e.The rocess is the following examp es Example sulfonate of soda are,dissolved with 32.? kilos sulfanilicacid-azo-al' hanaphthylamin in 500liters water and ilos caustic soda lye of 40 Baum and heated to boilingtemperature for 3 t0 4' hours. The solution is neutralized with mineralacid and thedyestuff precipitated with salt, It dyes cotton anorange-red shade. 1

Example II. If in the place ofsulfanilicacld-azo-n'a kilos benzo azoalphanaphthylamin-sulfo acid Cleve are used, the conditions beingotherwise the same, an orange-red dyestufi is obtained.

Specification of Letters Patent. v Application filed June 9, 190a.ska-mm. 437,511.

4 in the Province of, Hesse-Nassau, Kingdom of Prussia,-Germau ne solu.The shades vary from 47, 4 kilos dinitrostilbenedi-' hthylamin inExample I 32.7-

fatented ov, 10, 1908.;

tanilic acid azo m ami o-p-cresolether in place of thesulfapilic-acid-azo-alphanaph- V Example III By usin 321 kilosmethylamin applied in Example I, the other conditions being the same, a'dyestufi is obtained after 2 to 3 hours heating to the boil,

which dyes cotton oran e.

In theseexamples t e dinitrostilbenedisulfo acid may be replaced by'thedinitrodi benzyldisulfo' acid, without any essential change of theresult.

Having now described the nature of my nvention and in what manner it maybe carried out, what I claim is 1. The process of producing orange,orange-red or brown coloring matters y allowin dinitrostilbencdisulfo"acid to act in alkaline solution on alnidoazosulfo acids,

substantially as described,

2. Thenew roducts or coloring matters which are pro need by thecondensation of' dinitrostilbenedisulfo acid and amidoazo sulfo acids,which are easily soluble in water with an orange 'color, nearl alcohol,soluble in strong sul ric acid with a bluish black shade, beingprecipitated in form of brown flakes from'such a solution by addition ofwater and dyeing unmorinsoluble in dantedcotton orange to. orange-red orbrown shades, substantially as described.

i In witness whereof I have hereunto signed my name this 18th day of May1908,

in the presence of two subscribing Witnesses,

ALFRED GRESSLY.

Witnesses:

JEAN GR ND, CARL GRUNnu

